Goldman Sachs remained upbeat on the U.S., however, and Oppenheimer said he expects a "reacceleration" after this "temporary slowdown." Coupled with better data in the euro zone, he said that overall it would be "pretty supportive for global activity."
The fresh U.S. GDP figures helped stunt the dollar's rise on Wednesday, along with a statement from the U.S. Federal Reserve. Consequently, the euro hit a two-month high Thursday against the greenback.
But, as with the dollar, Oppenheimer remained adamant that investors should not focus on these currency movements.
"I think that growth is really the most important factor here. That's what's really going to drive profits and dividends and that's really ultimately what equity investors are looking for," he said.
"The effects on the currency mainly via profits, their translation effects...they're relatively moderate. Of course it is helpful to see the euro weakening but I don't think it is essential."
His comments echo Dennis Gartman's, the editor and publisher of the Gartman letter, who said a strong dollar should not hamper markets. Speaking to CNBC Thursday, the closely-watched investor added that trying to guess the market's direction on the back on the back of the dollar's direction was a "mug's game."